Control systems and methods for transmission of hybrid power vehicle

A hybrid-power driving system for a vehicle, comprising:

• a transmission, including:
• a plurality of shafts, including an input shaft, a motor shaft, and an output shaft, wherein:
• (i) the input shaft is coupled to a clutch, the clutch being configured to selectively engage an engine to couple the input shaft to the engine, the engine being configured to generate an engine torque transferable to the input shaft via the clutch,
• (ii) the motor shaft is coupled to an electric motor, the electric motor being configured to generate a motor torque transferable to the motor shaft, and
• (iii) the output shaft delivers an output torque from the transmission;
• a plurality of gearwheels configured to provide a plurality of transmission paths;
• and
• a plurality of synchronizers disposed on the plurality of shafts operable to engage a set of selected gearwheels;
• and
• a transmission control system configured to cause the transmission to start the engine when the vehicle is in a parked state, the transmission control system including:
• a clutch actuation module configured to control the clutch, wherein the clutch transfers a clutch torque from the electric motor to the engine to start the engine;
• and
• a gear shifting actuation module configured to move at least one of the plurality of synchronizers to cause the plurality of synchronizers to engage a set of selected gearwheels, the set of selected gearwheels determining a transmission path that allows a motor torque to be transferred from the electric motor to the input shaft to provide the clutch with the clutch torque.

A method for a hybrid-power driving system, the hybrid-power driving system including:

• a transmission, including:
• a plurality of shafts, including an input shaft, a motor shaft, and an output shaft, wherein:
• (i) the input shaft is coupled to a clutch, the clutch being configured to selectively engage an engine to couple the input shaft to the engine, the engine being configured to generate an engine torque transferable to the input shaft via the clutch,
• (ii) the motor shaft is coupled to an electric motor, the electric motor being configured to generate a motor torque transferable to the motor shaft, and
• (iii) the output shaft delivers an output torque from the transmission;
• a plurality of gearwheels configured to provide a plurality of transmission paths;
• and
• a plurality of synchronizers disposed on the plurality of shafts operable to engage a first set of selected gearwheels, the first set of selected gearwheels determining a first transmission path that transfers the motor torque from the motor shaft to the output shaft without transferring any engine torque from the engine to the output shaft;
• the method comprising:
• determining a requirement to transfer both the motor torque from the motor shaft and the engine torque from the engine to the output shaft;
• moving, via a transmission control system, at least one of the plurality of synchronizers to cause the plurality of synchronizers to engage a second set of selected gearwheels instead of the first set of selected gearwheels, the second set of selected gearwheels determining a second transmission path that includes a motor torque transmission path and an engine torque transmission path, the second transmission path transferring the motor torque from the motor shaft and the engine torque from the engine to the output shaft for the output torque;
• and
• operating, via the transmission control system, the clutch to transfer a clutch torque from the electric motor to the engine to start the engine;
• and
• after the engine has started, operating, via the transmission control system, the clutch to transfer the engine torque to the input shaft according to the second transmission path.

A method for a hybrid-power driving system for a vehicle, the hybrid-power driving system including:

• a transmission, including:
• a plurality of shafts, including an input shaft, a motor shaft, and an output shaft, wherein:
• (i) the input shaft is coupled to a clutch, the clutch being configured to selectively engage an engine to couple the input shaft to the engine, the engine being configured to generate an engine torque transferable to the input shaft via a clutch,
• (ii) the motor shaft (4) is coupled to an electric motor, the electric motor being configured to generate a motor torque transferable to the motor shaft, and
• (iii) the output shaft delivers an output torque from the transmission;
• a plurality of gearwheels configured to provide a plurality of transmission paths;
• and
• a plurality of synchronizers disposed on the plurality of shafts operable to engage a set of selected gearwheels,
• the method comprising:
• determining a requirement to modify the transmission to start the engine when the vehicle is in a parked state;
• operating, via a transmission control system, the clutch to transfer a clutch torque from the electric motor to the engine to start the engine;
• and
• moving, via a transmission control system, at least one of the plurality of synchronizers to cause the plurality of synchronizers to engage a set of selected gearwheels, the set of selected gearwheels determining a transmission path that allows a motor torque to be transferred from the electric motor to the input shaft to provide the clutch with the clutch torque.